Over-shot fishing tool



March 8, 1938. w. s. JoNl-:s

OVER-SHOT FISHING TOOL Filed March 16, 1936 l, I/vvf/vTan. WMF/f1.0 5607"? ../o/vfs.

ITTOR/VEX Patented Mar. 8, 1938 UNITED STATES PATENT OFFICE Claims.

This invention relates to an over-shot shing tool by means of which a broken fragment of pipe, tubing, or the like, can be removed from a well.

An object of my invention is to provide a novel over-shot fishing tool including a novel means of packing oif the broken pipe, tubing, or the like, so that the circulating fluid may be forced thru said pipe or tubing.

Another object is to provide a novel over-shot iishing tool of the character stated, including a second packing means for sealing off the inside of the tool housing.

Still another object is to provide a novel means of supporting the slips whereby relative movement of the slips and the packing mounting means is possible.

Other objects, advantages and features of invention may appear from the accompanying drawing, the subjoined detailed description, and

the appended claims.

1n the drawing: Figure l is a longitudinal sectional view of my novel over-Shot iishing tool.

Figure 2 is a fragmentary longitudinal sectional view of the packing and slip mounting means.

Figure 3 is a sectional View taken on line 3--3 of Fig. 2.

Referring more particularly to the drawing, the

numeral I indicates a tubular housing which encloses the grappling means to be subsequently described.

A head 2 is attached to the upper end of the housing, preferably by threading into said housing. 'Ihe drill pipe 3 screws onto the head 2 and the tool is operated and lowered into the well on a string of tubing, which procedure is usual and well known.

40 A plurality of slips 4 are mounted in the housing I and these slips engage a tapered seat 5 in the lower end of the housing whereby said slips are forced inwardly to engage the fish 6 which may be pipe, tubing, or the like.

4,5 While the lost pipe or tubing is being recovered, it is necessary to continue the circulation of drilling mud in the well and for this purpose I provide a novel means of packing off the housing and the upper edge of the pipe or tub- 50 ing so that the drilling mud is forced into said pipe or tubing.

A collar I is mounted in the housing I and this collar supports an annular packing ring 8. The periphery of this packing ring engages the 55 wall of the housing I, as shown in Figs. 1 and 2.

The packing is forced outwardly against the wall of the housing by the pressure of the drilling mud in the housing. A tube 9 is supported from a ring IIJ which ring rests upon the packing 8.

A nut II screws onto the top of the tube 3 and 5 bears against the ring I0, thereby holding the tube against downward movement thru the ring.

A coil spring I2 bears against the upper face of the ring ID and this spring tends to force the packing 8, the collar l and the tube 9 downward- 10 ly, and also forces the slips 4 downwardly onto the seat 5, as will be evident from the subsequent description.

A second packing ring I3 is mounted on the lower end of the tube 9 and also bears against l5 the bottom of the collar l. The packing I3 rests against the upper edge of the sh 6, thereby packing off the fish so that the drilling mud is forced downwardly thru the tube and direct into the pipe or tubing fragment. 20

Each of the slips 4 is provided with an inwardly extending lug I4 at the upper end thereof. These lugs t into an annular groove I5 in the collar l. There is a lost motion connection between the slips and the collar 1, as shown at 25 I6. The purpose of this connection is to enable the packing I3 to seat against the top of the pipe 6 after the slips 4 engage the pipe. That is, if the slips 4 should` engage the pipe, the packing I3 is tightly pressed against the 30 pipe 6, then the pressure of the spring I2 will urge the collar l, the tube 9 and the packing I3 downwardly to make a tight seal at the top of the pipe.

Due to the friction of the packing 8 against 35 the wall of the housing I, the entire assembly of packings 8, I3, the collar l, and the tube 9 will be held in the position shown in Fig. 2 until the slips 4 are set. Thereupon, the space I 6 will be available to insure that the packing I3 40 will seat tightly against the top of the pipe.

Having described my invention, I claim:

1. An over-shot fishing tool comprising a housing, a tapered seat in the housing, slips adapted to engage the seat, a collar, a tube extending thru the collar, a packing mounted on the upper end of the collar, a second packing mounted on the lower end of the collar, means coupling the slips to the collar and spring mea-ns urging the slips and packing downwardly.

2. An over-shot shing tool comprising a housing, a tapered seat in the housing, slips adapted to engage the seat, a collar, a tube extending thru the collar, a packing mounted on the upper end of the collar, a second packing mounted on the lower end of the collar, means coupling the slips to the collar, spring means urging the slips and packing downwardly, said means coupling the slips to the collar having a lost motion connection whereby said collar and the packings may move relative to the slips.

3. An over-shot fishing tool comprising a housing, a tapered seat in the housing, slips adapted to rest on the seat, a collar, a packing ring mounted on the upper end of the collar, a second packing ring mounted on the lower end of the collar, a tube extending vertically thru the collar, inwardly extending lugs on each of the slips, said collar having an annular groove therein adapted to receive said lugs, said groove being of greater width than the lugs whereby a lost motion connection is provided between the collar and the slips.

4. An over-shot shing tool comprising a housing, a tapered seat in the housing, slips adapted to engage the seat, a collar, a tube extending through the collar, a packing mounted on the upper end of the collar, a second packing below the collar, said second packing encircling the tube, said tube engaging the lower face of the second packing, and a ring adjacent the upper end of the tube, said ring bearing on the first named packing.

5. An over-shot fishing tool comprising a housing, a tapered seat in the housing, slips adapted to engage the seat, a collar, a tube extending through the collar7 a packing mounted on the upper end of the collar, a second packing below the collar, said second packing encircling the tube, said tube engaging the lower face of the second packing, and a ring adjacent the upper end of the tube, said ring bearing on the rst named packing, -means coupling the slips to the collar, and spring means urging the slips and packing downwardly.

WINFTELD SCOTT JONES. 

